介质阻挡放电协同光催化降解硫化氢废气  

Degradation of Hydrogen Sulfide Waste Gas by Dielectric Barrier Discharge Synergistic Photocatalysis

作　　者：梁旭 周伟[1] 王梓鑫 朱礼想 沈欣军[1] LIANG Xu;ZHOU Wei;WANG Zixin;ZHU Lixiang;SHEN Xinjun(School of Environmental and Chemical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学环境与化学工程学院,辽宁沈阳110870

出　　处：《环境科学与技术》2021年第9期190-195,共6页Environmental Science & Technology

基　　金：辽宁省科学研究基金(LFGD2020001);沈阳市科技计划项目(20-206-4-01)。

摘　　要：恶臭是一种感觉公害,极大地危害着人们的身体健康和生活的安宁舒适,其中含硫恶臭气体是最为典型的一类,目前恶臭物质的治理问题成为一项重要的任务。为了达到理想的去除效果,该文在传统的介质阻挡放电技术上,协同由2种不同基体上沉积有纳米二氧化钛的催化剂降解硫化氢废气,分别采用单独DBD放电、协同催化的一段式、两段式系统研究了不同参数(输入电压、气体流量、初始浓度)对硫化氢废气降解效率的影响,并对比研究了在单独低温等离子技术及其协同催化剂的情况下,反应系统中臭氧、二氧化氮浓度的变化,对降解途径进行了分析讨论。结果表明:随输入电压增大,以及在污染气体初始浓度和流量较小时,反应器对硫化氢气体的去除效率增大;协同催化剂的反应系统中硫化氢去除效果明显增强,且副产物减少。Malodor is a kind of sensory public hazard,which has become one of the seven environmental public hazards in the world,greatly endangers people’s health and the comfort of life,among which the malodor gas containing sulfur is the most typical one.At present,the treatment of malodor substances is becoming an important task.In order to achieve an ideal removal effect,based on the traditional dielectric barrier discharge technology,a catalyst with nanotitanium dioxide deposited on two different substrates were used for the coordinated degradation of hydrogen sulfide gas.DBD discharge alone,concerted catalysis,two stages of one system were respectively studied to investigate the influence of different parameters,such as the input voltage,gas flow rate,initial concentration on the degradation efficiency of hydrogen sulfide gas.And comparative study was done on the change of ozone,nitrogen dioxide concentration in the reaction system under the conditions of low temperature plasma technique and its coordination catalyst.The results show that the removal efficiency of hydrogen sulfide gas in the reactor increases with the increase of the input voltage,and when the initial concentration and flow rate of the contaminated gas are small,the removal effect of hydrogen sulfide in the reaction system with co-catalyst is obviously enhanced and the by-products are reduced.

关 键 词：低温等离子体 二氧化钛 硫化氢 催化 副产物 

分 类 号：X701.7[环境科学与工程—环境工程]